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Natural sciences

Grade 4

Planet earth and the universe

Module 45

Stormy weather

Activity:

Learning about stormy weather conditions

[lo 2.1, 3.1]

Stormy weather

:

What do you do when the weather is stormy? Tell the class about funny stories related to storms.

Dark clouds converge in the air. Heavy rains fall to the earth. Now and again there is a bright flash of lightning and we hear the roar of thunder. But what is actually happening?

Clouds:

The air is full of small dust particles. Water drops form around such dust particles and then form clouds together with millions of other drops.

Try the following:

Mark an empty bottle in mm and place it outside when it rains.

Lightning:

During a storm strong winds blow the small water drops that have formed around the dust particles, into the centre of the clouds where they bounce against each other. Each of the small particles of a cloud has either a positive or negative electrical charge. When the particles bump against each other the charges separate. The majority of the positive charges move to the top of the cloud and the negative charges move toward the bottom of the cloud. Lightning is a massive electrical spark in the cloud. This spark occurs when the negative charges in one cloud come into contact with the positive charges in another cloud or with the ground.

Thunder

Thunder is the loud noise that you hear when warm air and cold air suddenly come together. When lightning brightens the sky, it also heats the surrounding air. When this hot air comes into contact with the cold air, a gigantic wave of moving air causes the clap of thunder.

Dangerous weather

Tornado

This is a very strong wind that is caused when a front with cold and dry air comes into contact with warm, moist air. It causes a large black cloud in the air. The warm air rises rapidly and more warm air moves in below it to replace it. Sometimes the rising air begins to move in a spiral and a tornado develops. If a tornado reaches the ground, it causes incredible damage because it sucks up everything that it encounters on the ground into the air.

Hurricane

This is a very big storm that starts on the surface of tropical seas. It consists of a large quantity of wind and rain that begins to spin around its centre, which we call the “eye”. It moves forwards as it rotates and creates enormous waves that are very destructive.

Cut A4 sheets of paper into four (into quarters) to have one small sheet of paper for each learner in the class. Each learner must draw an aspect of the weather on his or her piece of paper. Work clearly and neatly. Stretch a washing line across the classroom and hang the drawings of the “weather conditions” from the line!

Assessment

LEARNING OUTCOME 2 : CONSTRUCTING SCIENCE KNOWLEDGE The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard

We know this when the learner

2.1 recalls significant information.

LEARNING OUTCOME 3 : SCIENCE, SOCIETY AND THE ENVIRONMENT The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

Assessment Standard

We know this when the learner

3.1 understands science and technology in the context of history and personal knowledge.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natural sciences grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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